add decode functions for info and data packets

internal/decoders/packet_header_chunk.go

@@ -0,0 +1,43 @@
+package decoders
+
+import "encoding/binary"
+
+type PacketHeaderChunkData struct {
+	PacketTimestamp  uint64
+	VersionHigh      uint8
+	VersionLow       uint8
+	FrameId          uint8
+	FramePacketCount uint8
+}
+
+func decodePacketHeaderChunkData(packetHeaderChunk Chunk) PacketHeaderChunkData {
+	packet_timestamp := binary.LittleEndian.Uint64(packetHeaderChunk.ChunkData[0:8])
+	version_high := packetHeaderChunk.ChunkData[8]
+	version_low := packetHeaderChunk.ChunkData[9]
+	frame_id := packetHeaderChunk.ChunkData[10]
+	frame_packet_count := packetHeaderChunk.ChunkData[11]
+
+	return PacketHeaderChunkData{
+		PacketTimestamp:  packet_timestamp,
+		VersionHigh:      version_high,
+		VersionLow:       version_low,
+		FrameId:          frame_id,
+		FramePacketCount: frame_packet_count,
+	}
+}
+
+type PacketHeaderChunk struct {
+	Chunk Chunk
+	Data  PacketHeaderChunkData
+}
+
+func DecodePacketHeaderChunk(bytes []byte) PacketHeaderChunk {
+	chunk := DecodeChunk(bytes)
+	data := decodePacketHeaderChunkData(chunk)
+
+	return PacketHeaderChunk{
+		Chunk: chunk,
+		Data:  data,
+	}
+
+}